Mitsui Minings & Melting Co., Ltd.

Mitsu Kinzoku Act Corporation

Takuya Kakumae

Hirofumi Watanabe

Kazuhito Yokomori

Nobuo Sugawara

Koji Chikata

In a door opening/closing device having a motor base and a sensor case, a rotation sensor is provided. The rotation sensor includes a magnetic member provided adjacent an end of a rotation shaft and a detecting element that is arranged so as to detect a magnetic flux that is generated from the magnetic member in a direction crossing a magnetic flux that is generated from an electromagnetic clutch arranged around the rotation shaft. The motor base is attached to the sensor case such that the end of the rotation shaft extends outside of the motor base and the rotation sensor is arranged adjacent the end of the rotation shaft.

Door opening/closing device

A door operating apparatus includes a motor bracket that covers a driving shaft of a driving motor; an output shaft that is disposed from the motor bracket toward the supporting bracket so as to be orthogonal to an extending direction of the driving shaft; a first rotational element that is linked with the driving shaft, and disposed on the output shaft; a second rotational element that is linked with a door operating mechanism, and disposed between the first rotational element and the supporting bracket on the output shaft; and a clutch unit including a clutch driving section that supports a rotation of the output shaft. When the first rotational element and the second rotational element are engaged by driving of the clutch driving section, the door operating mechanism is actuated by the driving force.

Door operating apparatus, electromagnetic clutch, and coupling mechanism

A case is mounted to one of a motor vehicle and a pivotal door and has therein a gear receiving space. An electric motor is mounted to the case. A speed reduction mechanism is installed in the gear receiving space of the case and driven by the electric motor. An output gear is rotatably received in the gear receiving space of the case and driven by the speed reduction mechanism. An output arm is placed above the case and connected to the output gear through an output shaft that passes through an upper wall portion of the case. A connecting rod has one end pivotally connected to the output arm and the other end pivotally connected to the other of the motor vehicle and the pivotal door. The connecting rod is arranged beside the case in a manner to avoid overlapping thereof with the case in a direction that is perpendicular to a direction in which the connecting rod is moved by the output arm.

Electric actuator of automotive pivotal door

The clutch includes a drive disk, a follower disk and a brake disk. When current flows, the follower disk is connected with the drive disk to transmit a power from a driving unit to a door-opening/closing mechanism. When no current flows, the follower disk is separated from the drive disk to cut off the power transmission from the driving unit to the door-opening/closing mechanism. In a state that the drive disk and the follower disk are separated from each other, the brake disk is connected to the follower disk to brake the door-opening/closing mechanism in the opening direction of the door, and to allow the door-opening/closing mechanism to move in the closing direction of the door.

Growing community of inventors

Yamanashi, Japan

Takuya Kakumae